AirHint found the following cheapest return flights from Bucharest (OTP) to Sofia (SOF) in October 2025 (see full year).

Return flights

16 Oct - 17 Oct	Wizz Air Malta
28 Oct - 04 Nov	Wizz Air Malta
11 Oct - 13 Oct	Wizz Air Malta
30 Oct - 04 Nov	Wizz Air Malta
16 Oct - 17 Oct	Animawings	direct
13 Oct - 20 Oct	TAROM
30 Oct - 01 Nov	Wizz Air Malta
12 Oct - 19 Oct	Austrian Airlines

Also check the deals for one-way flights from Bucharest to Sofia in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Bucharest to Sofia in October from 83€

Return flights